problem installing Dolphin

[shailendra_devil48]

Dear Sir,
I am installing dolphin and is struck at this step:-
Path to php binary --->:not found
Description: You should specify full path to your PHP interpreter here.
Example: /usr/local/bin/php


Path to mogrify --->not found
Description: If mogrify binary doesn't exist please install ImageMagick
Example: /usr/local/bin/mogrify




Path to convert ----> not found
Description: If convert binary doesn't exist please install ImageMagick
Example: /usr/local/bin/convert




Path to composite---> not found
Description: If composite binary doesn't exist please install ImageMagick
Example:
/usr/local/bin/composite


Please Tell Me What Shall I Do
thank You